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Round|Natural|GIA

1.51ct H SI2 Round Natural Diamond

EX • H/SI2 • GIA 1559762644

Certificate GIA 1559762644

Diamond specifications and retailer prices

From $6,859 AUD
$4,818 USD
As of October 31, 2026
Save $8,325 AUD (55%) vs most expensive(unlock to see where)
20 retailers carry this diamond
Most expensive: $15,184 AUD at NZ Jewellers · As of October 30, 2026
View at NZ Jewellers

About this 1.51ct natural round diamond

This 1.51ct natural round sits in the one-and-a-half to two carat band, graded H colour (near-colourless) and SI2 clarity (slightly-included), with a top-tier cut grade and certified by GIA 1559762644. Listed at 20 retailers as of October 30, 2026, with prices from $6,859 to $15,184, a $8,325 spread on the same certified stone. NZ Jewellers lists it at $15,184. SI-grade stones are eye-clean roughly 60 to 70% of the time at this carat range. Check the inclusion plot on the cert and ask the retailer for high-resolution video before buying.

The 4Cs

1.51
Carat
H
Colour
SI2
Clarity
Excellent
Cut

Specifications

CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
Crown angle36°
Pavilion angle41°
OriginNatural
Grading LabGIA
CertificateGIA 1559762644
Dimensions7.28 × 7.33 × 4.56 mm
L/W Ratio1.01
Culet sizeNone
Top View
7.28 mm7.33 mm1.51 ctH / SI2
OriginNatural
CutExcellent
PolishExcellent
SymmetryExcellent
FluorescenceNone
CertificateGIA 1559762644
Side View
Table 59.0%Crown 36°Girdle: STK-STKPavilion 41°Culet: NoneDepth 62.4%

Caratlytics Score

How it works →
A
Excellent
Excellent quality and great value
Unlock full score analysis
See the detailed 0 to 100 score with Quality, Value, Certification & Market breakdown

Price History

Last verified: Oct 31
Current: $15,184 AUD|Low: $6,859 AUD|High: $15,184 AUD|Avg: $9,793 AUD|+17.3%
NZ Jewellers
Retailer 2
Retailer 3
Retailer 4
Retailer 5
Retailer 6
Retailer 7
Retailer 8
Retailer 9
Retailer 10
Retailer 11
Retailer 12
Retailer 13
Retailer 14
November 1, 2026
Retailer 11$6,859 AUD
Retailer 7$6,954 AUD
Retailer 6$7,174 AUD
Retailer 5$7,592 AUD
Retailer 3$8,226 AUD
Retailer 13$8,226 AUD
Retailer 14$8,226 AUD
Retailer 10$8,651 AUD
Retailer 4$9,490 AUD
Retailer 2$9,878 AUD
Retailer 8$10,965 AUD
Retailer 9$13,375 AUD
Retailer 12$14,175 AUD
NZ Jewellers$15,184 AUD

25 data points across 14 retailers

20 retailers$6,859 AUD to $15,184 AUD

A
Cheapest Retailer
-
$6,859 AUD
$4,818 USD
A
Retailer 2
-
$6,954 AUD
$4,885 USD
View
A
Retailer 3
-
$7,174 AUD
$5,039 USD
View
B+
Retailer 4
-
$7,592 AUD
$5,333 USD
View
Final sale: no returns
B+
Retailer 5
-
$8,119 AUD
$5,703 USD
View
B+
Retailer 6
-
$8,226 AUD
$5,778 USD
View
B+
Retailer 7
-
$8,226 AUD
$5,778 USD
View
B+
Retailer 8
-
$8,226 AUD
$5,778 USD
View
B+
Retailer 9
-
$8,267 AUD
$5,807 USD
View
B+
Retailer 10
-
$8,651 AUD
£4,785 GBP
View
B+
Retailer 11
-
$8,826 AUD
$6,200 USD
View
B+
Retailer 12
-
$8,826 AUD
$6,200 USD
View
B+
Retailer 13
-
$9,111 AUD
$6,400 USD
View
B+
Retailer 14
-
$9,490 AUD
$6,666 USD
View
B+
Retailer 15
-
$9,878 AUD
€6,608 EUR
View
Retailer 16
-
$10,012 AUD
$7,033 USD
View
Price last confirmed 17 days ago
B+
Retailer 17
-
$10,965 AUD
£6,065 GBP
View
B
Retailer 18
-
$13,375 AUD
£7,398 GBP
View
B
Retailer 19
-
$14,175 AUD
£7,840 GBP
View
Most Expensive
B
NZ Jewellers
acae055a-3203-40ce-bc1b-966d8c4cac9b · Oct 30
$15,184 AUD
$10,666 USD
View
19 more retailers have this diamond
Prices start from $6,859 AUDSave up to $8,325 AUD

Carat Hunter is not affiliated with, endorsed by, or sponsored by any retailer listed. Retailer information is from publicly available sources and may not be current. Verify details directly with the retailer before purchasing. Return terms as we hold them. Check the retailer's own returns page before you buy.

A
1.51ct Round
$6,859 AUD